[1] Univ Campania Luigi Vanvitelli, Dept Adv Med & Surg Sci, Policlin CS, Colorectal Surg, Piazza Miraglia 2, I-80138 Naples, Italy
[2] Columbia Univ, Med Ctr, Dept Surg, Div Colon & Rectal Surg,New York Presbyterian, New York, NY USA
[3] L Sacco Univ Hosp, Milan, Italy
[4] Azienda Osped Padova, Gen Surg Unit, Padua, Italy
[5] Humanitas Clin & Res Ctr, Colon & Rectal Surg Div, Milan, Italy
[6] Univ Portsmouth, Portsmouth Hosp NHS Trust, Portsmouth, Hants, England
[7] Alma Mater Studiorum Univ Bologna, St Orsola Hosp, Dept Med & Surg Sci, Surg Alimentary Tract, Bologna, Italy
[8] Univ Naples Federico II, Dept Clin Med & Surg, Naples, Italy
[9] Univ Firenze, Dept Surg & Translat Med, Surg Unit, Florence, Italy
[10] Policlin Tor Vergata, Dept Surg, Minimally Invas & Gastrointestinal Unit, Rome, Italy
[11] Univ Cattolica Sacro Cuore, Abdominal Surg Dept, Fdn Policlin Univ A Gemelli IRCCS, Rome, Italy
[12] Assoc Nazl Malattie Infiammatorie Cron Intestino, CEO, Milan, Italy
[13] Humanitas Univ, Div Gastroenterol, IBD Ctr, Milan, Italy
[14] Pederzoli Hosp, Dept Surg, Verona, Italy